I all so feel the 20 / 50 or even the 20 / 40 is to thick when it comes to synthetic oil.
I have over 30 thousand running synthetic oil and pull the front wheel off the ground and break the tire loose when I want.
No slippage

Hmmmm. I thought I was looking through an HD site forum post there for a minute. I appreciate the oil lecture and hence why I am running the synthetic blinker fluid myself. Run what you want, but when all else fails and the dealer is too far away, which I fail to understand since half the fun is getting there, you can always roll over to your nearest computer and order what you need through Amazon. Here is the link http://www.amazon.com/2008-2013-Victory-Vision-Tour-Change/dp/B00BL...

Peace out you oil freaks and I mean that with the utmost respect of course Vlad

The thing about oil is, some know, some listen to others. If you're going to make a buck, you got to be better than the next guy, or at least say you are, then hope nothing goes wrong. But you can go right, or you can go dramatically wrong over the simple things. The safe bet is always use what the people say that make what you are using. Everything OEM all the time is what the manufacturer wants you to use. After market folks, especially oil people would be hard pressed to make one size fits all across all manufacturers. So it is left up to us peons to do our homework if we dare stray from the recommended, hence the copious discussion on various topics. I personally find it somewhat refreshing because gleaning through all the minutia there is often found a nugget of good information. My personal experience is just that, take it or leave, as I do yours, who ever that may be. While one may not have the same experience as another, it may only be because it was not under the same circumstance. There are tons of circumstances and tons of experiences. I know some have screwed their machines up using something that said - "this is the end-all, catch-all" for you, not realizing it wasn't for their application. Most of this becomes great education for another that has not battled through this yet. It is something that will never go away, and it is something that carries some value, otherwise, so many would not chime in to refute or to tout.

All the time spent on oil and dark side tires is funny. One thing for sure, ive never heard of a Vic blowing up or having engine problems due to the oil they used if it is the correct weight and Jaso . As long as Everyone is using the proper weights and Jaso so take your pick and enjoy Worst thing is clutch slip, I had that with amsoil, learned lesson and switched back. I haven't used the castrol 4t, but bet it will be great in your Vic. I like what I use cause I did my diligence and made a choice, 83000 problem free mikes and I'm not looking back.
Pick the right weight and Jaso and don't worry about it, it's oil. No magical victory or amsoil oil fountains out there.

I run an Auto Parts Store in New England. Every oil manufacturer I deal with says the same thing:

Castrol, Mobil-1, Lucas, Royal Purple, Shell and Valvoline. "Any semi or full synthetic with a 40 Viscosity AND a JASO MA or MA-2 motorcycle rating will work fine and not induce any clutch slippage in our Victory 106 engine."

I use Maxima 4 Synthetic. I have spoke w/many reps/sales/engineers. Common since Victory recommends 40wt for second # do not use a 50wt oil. The 1st # 20wt you can use 5,10,15,20. Just make sure JASO approved. Synthetic or semi...

I used it on my last oil change and about 5,000 miles the engine seems to be noisey like it thins out when it get hot. I went back to Amsoil (3-20/50,2*10-40). It held up in the past for 10,000. Changed filters (wix 5136) at 5,000

I run an Auto Parts Store in New England. Every oil manufacturer I deal with says the same thing:

Castrol, Mobil-1, Lucas, Royal Purple, Shell and Valvoline. "Any semi or full synthetic with a 40 Viscosity AND a JASO MA or MA-2 motorcycle rating will work fine and not induce any clutch slippage in our Victory 106 engine."

Makes sense but do you believe it's true?

In my opinion, the 106 is the best production Vtwin out there, but not exactly anything to get your boxer shorts tied up in a bunch either. In the stock configuration, the VV produces around 93 HP and 105 foot pounds of torque so this is not exactly a rocket ship compared to the powerplants of crotch rockets, sports tourers, or larger displacement enduros where the choice of motor oil is more critical in my opinion.

My stock 2002 Honda Civic DX lean/green/gas saving machine with a 1.7 liter displacement engine (roughly same displacement as the VV) produced more power and torque at 115 HP and 110 lbs of torque and redline at 6100 RPMs. I'm not trying to compare cars to motorcycles, but want to make a point here and yes I understand oil is also important in these air/oil cooled Vtwins. The VV is a long distance pack mule and not a Arabian sprinter horse

I think it is important to note that everyone who is running something else then OEM Victory motor oil made that choice for one reason or another and all the power to you, but I personally think the OEM motor oil will do just fine in 98% of all applications not to mention possible warranty issues down the road.

I'm sure these guys below stay up nights worrying about what motor oil application they will use for any F1 fans out there

wingit3611 - 2014-06-21 9:04 AM I used it on my last oil change and about 5,000 miles the engine seems to be noisey like it thins out when it get hot. I went back to Amsoil (3-20/50,2*10-40). It held up in the past for 10,000. Changed filters (wix 5136) at 5,000

I was using the 4T,20w-50 racing. It also shifted terrible, thought I was about to have transmission trouble. With the Amsoil it back to smooth shiftying. Tranny is fine.

To the OP about the Castrol 20W40 Actevo X-tra 4T. This is the same oil that Triumph uses from the factory on their Triumph Trophy bikes. I know because I just traded one in for the Cross Country Tour. They use the 10W40 version and the oil change interval is 10,000 miles on that bike. Never a bit of problem with the oil and was decently clean at 10,000 miles on the last change. It is a full synthetic designed for wet clutches. Now for those who are wondering why I traded that bike in, it was strictly for comfort. My knees couldn't take the somewhat bent position of all day riding and not hurt. The bike is a great sport tourer and the sound from the exhaust is downright wicked at 1/2 throttle and up for stock. And I'm sure going to miss the 300+ miles out of a tank of gas.

Now after watching the Castrol videos, I gotta switch to Castrol. I guess I gotta throw out the Rotella T. Since this post was 3 years old would be interesting to have an update on his choice of slippery fluids, or did he just throw KY in it and call it good.

Or you can bypass the dealer and order whatever snake oil, including Victory oil you need from Amazon? I think if you keep her consistently under 110mph you should be alright. Just a thought... I think since we have so many professional chemists that took the liberty of chiming on the long-stemming oil debate, anybody brew any good home brew lately? (Wishing I was reading a home brewing forum instead)

pollolittle, I guess you are referring to me and my experience with Castrol ActEvo X-Tra 4T Semi-Synthetic 4-Stroke Motor Oil. Here goes. It's just as good as Vic Oil from my perspective, and cheaper. I usually get it at the local Cycle Gear Shop. But I have ordered it online via Amazon when I get free shipping and a better deal.

I've been using it for the last few years and it is not different from Vic Oil IMHO. Initially, I used the 20-40. Then a while back they stopped making that and now only make the 10-40. Since the 40 is the important number, I've been using it ever since. No problems at all. Same performance IMHO as Vic Oil.

Now, when I used Amsoil years ago my wrench put in the 20-50 and I had clutch slippage after a few hundred miles. Per Kevin X I changed back to Vic Oil and 300 miles later the slippage was gone. Not everyone has had clutch slippage with Amsoil. So now that Amsoil have a 10-40 for Vic and Indian, I'm giving it a try. (Oil changed by an old friend at Biketoberfest last week,) I'll let you know if the clutch slippage returns with this version of Amsoil. So far (100 miles or so) I don't see much difference. Perhaps a slightly easier and slightly quieter shift, but that might be psychosomatic.